This adds a new test helper library that depends on LittleCMS 2.
For starters, the library implements conversion from enum transfer_fn to
ICC multiProcessingElements compatible LittleCMS curve object.
That conversion allows encoding transfer funtions in ICC files and
LittleCMS pipelines with full float32 precision instead of forcing a
conversion to a 1D LUT which for power-type curves is surprisingly
imprecise.
This also adds CI tests to make sure the conversion matches our
hand-coded transfer functions.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
These helpers allow collecting color difference statistics easily.
To be used in color-shaper-matrix-test.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
When defining a color space with a transfer function, this looks up the
inverse transfer function without needing to store that separately.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
This will be useful to make a curve in a color pipeline pass-through
without needing to special-case skipping the curve.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Make process_pixel_using_pipeline() slightly easier to read by
extracting a meaningful function.
Pure refactoring, no behavioral changes.
Compared to previous, flip the scalar multiplication around, so that it
matches the mathematical order of matrix-vector multiplication.
Also document the layout conventions for lcmsVEC3 and lcmsMAT3. These
follow the convention used in LittleCMS for cmsVEC3 and cmsMAT3, and are
necessary to understand to review the matrix-vector multiplication for
correctness.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Looks like this was forgotten, and I managed to get compiler errors
about redeclaring all enums.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Individual struct fields are inconvenient to index into, yet most
operations on a color just repeat the same for each of RGB channel.
Being able to index into RGB avoids repeating the same code for each
channel.
Alpha channel is left as separate, since it is almost never handled the
same as RGB.
The union keeps the old .r, .g and .b addressing working. The static
asserts ensure the aliasing is correct.
For demonstration, two simple functions in color_util.c are converted.
Unfortunately initializers need to be corrected everywhere. Field .a is
not explicitly initialized because it is unused in these cases.
This change should make code easier to read.
This change requires gnu99 or c11 standard. gnu99 is already the default
in top-level meson.build.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
No functional change. Moved color processing
functions into shared files which can be used
between different tests.
Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
It is a public installed header used by libweston.h.
See "Rename compositor.h to libweston/libweston.h" for rationale.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
weston-launch starts weston and provides mechanism
for weston to set/drop drm master, open a tty,
and read input devices without being root.
Execution is allowed for local-active sessions
or users in the group weston-launch.
This rename addresses a few problems around the split between core
Wayland and the wayland-demos repository.
1) Initially, we had one big repository with protocol code, sample
compositor and sample clients. We split that repository to make it
possible to implement the protocol without pulling in the sample/demo
code. At this point, the compositor is more than just a "demo" and
wayland-demos doesn't send the right message. The sample compositor
is a useful, self-contained project in it's own right, and we want to
move away from the "demos" label.
2) Another problem is that the wayland-demos compositor is often
called "the wayland compsitor", but it's really just one possible
compositor. Existing X11 compositors are expected to add Wayland
support and then gradually phase out/modularize the X11 support, for
example. Conversely, it's hard to talk about the wayland-demos
compositor specifically as opposed to, eg, the wayland protocol or a
wayland compositor in general.
We are also renaming the repo to weston, and the compositor
subdirectory to src/, to emphasize that the main "output" is the
compositor.
Besides the new header file, there's also a change in the main evdev creation
procedure for a more suggestive name (evdev_input_add_devices ->
evdev_input_create). There's no real functional changes in this commit.
Signed-off-by: Tiago Vignatti <tiago.vignatti@intel.com>
Pekka Paalanen
Vitaly Prosyak
Bryce Harrington
Peter Hutterer
Benjamin Franzke
Kristian Høgsberg
Tiago Vignatti